Amazon.com said that it is now offering six-month prescriptions starting at $6 for medications of common health issues through its pharmacy.

The company said prime members would get additional savings when paying without insurance, paying as low as $1 per month for select medications — including drugs to treat diabetes and blood pressure — and will get free two-day delivery.

Customers can search for their medication by name and find out if it’s eligible for a six-month supply and what the price it will be with the Prime prescription savings benefit. However, the supplies would be available only for customers who have a prescription from their healthcare providers.

Amazon’s online pharmacy was launched in November with the goal of delivering prescription medications in the United States. And unsurprisingly, on the news of the launch, shares of pharmacy chains and drug wholesalers fell — including those of Walgreens and CVS as well as those of drug distributors AmerisourceBergen and McKesson.

Amazon is also looking at launching physical pharmacies in the United States, the Insider reported last month.